A contactor with fast arc extinction

Abstract

This application relates to a contactor for rapid arc extinguishing. The contactor includes a housing, several switching mechanisms disposed within the housing, an arc extinguishing mechanism, a sliding hole, and a contact groove. The switching mechanism includes a stationary contact, a moving contact, and a linkage rod. The stationary contact includes a conductive plate and a stationary contact point, fixed inside the housing. One end of the conductive plate has the stationary contact point, and the other end is disposed in the contact groove. The conductive plate is fixedly connected to the housing in the middle and has a limiting hole near the stationary contact point. The moving contact includes a plate bridge and two moving contacts. The plate bridges are parallel to each other and pass through the linkage rod. The moving contacts pass vertically through both sides of the plate bridge. The linkage rod is disposed within the sliding hole. The arc extinguishing mechanism includes a base plate and an arc extinguishing plate. The base plate is perpendicular to the conductive plate, and the arc extinguishing plate passes through the limiting hole and is inclined towards the stationary contact point. This contactor for rapid arc extinguishing uses an arc extinguishing plate instead of an arc extinguishing grid. Under the action of electromagnetic arc ignition, the arc extinguishing plate accelerates the cooling of the arc, resulting in a simple structure and low cost.

Description

Technical Field

[0001] This invention relates to the field of electrical switches, specifically to a contactor for rapid arc extinguishing. Background Technology

[0002] With the development of industrial society, contactors are used more and more widely. However, the opening and closing of contactor contacts or switches generates electric arcs and sparks. These sparks can burn the contact points, eventually leading to poor circuit contact and damage. They can also cause arc burns to the eyes and skin, posing unpredictable dangers to human health. In places sensitive to electric arcs, such as gas plants or areas containing flammable gases, even a tiny spark can cause an explosion. Therefore, arc-extinguishing devices are necessary to prevent these hazards from being installed on contactors.

[0003] In existing technology, the moving contact of a contactor is typically mounted movably within the housing, while the stationary contact is fixedly mounted on the housing. During operation, the moving contact moves up and down to contact or separate from the stationary contact, thus connecting or disconnecting the working circuit. The contacts move under the attraction of the energized coil, causing the moving contact to close or separate from the stationary contact. Therefore, an arc-extinguishing chamber is usually installed on the housing, and an arc-extinguishing grid is installed within the arc-extinguishing chamber to bring the arc into contact with a fixed medium, causing the arc to elongate and cool rapidly. Then, an arc-extinguishing structure guides the arc to the arc-extinguishing grid for extinguishing. However, for contactors with a large number of contacts, using an arc-extinguishing grid has drawbacks: it occupies too much space, has limited arc-extinguishing capacity, slow response speed, complex installation, and high cost.

[0004] Therefore, there is an urgent need for a contactor with a simple structure and the ability to quickly extinguish arcs. Chinese Patent Publication No. CN211016852U, entitled "A DC Contactor with an Arc Extinguisher," discloses a DC contactor with an arc extinguisher, including a contactor and contacts. An arc extinguishing cover is fixedly connected to the top of the contactor, and several arc extinguishing grids are fixedly connected to both sides of the inner wall of the arc extinguishing cover. The contacts are fixedly installed on the top of the arc extinguishing cover, with the bottom of the contacts located inside the arc extinguishing cover. Mounting seats are fixedly connected to both sides of the bottom of the contactor. A mounting plate is provided on the mounting seat, and a movable block with a screw is slidably installed inside the mounting plate. In use, the mounting seat is placed stably on the mounting surface, the movable block is moved to adjust the screw above the positioning hole on the mounting surface, and the screw is screwed downwards into the positioning hole to fix the position of the mounting seat. To disassemble, the screw is screwed upwards to disengage from the positioning hole, and the device can be removed from the mounting surface. Its disadvantages are: the arc-extinguishing grid is difficult to install, has a high cost, occupies a large space, and the contactor is cumbersome to disassemble using screws and positioning holes, making it inconvenient to use.

[0005] This invention provides a contactor for rapid arc extinguishing, which improves upon the traditional arc extinguishing mechanism used in contactors. It uses a simple arc extinguishing plate, which ignites the arc and accelerates its cooling under the action of electromagnetic arc ignition. The structure is simple, the cost is low, and it is easy to install and operate. At the same time, the use of elastic elements and rollers allows the contactor to be selectively installed and used. Summary of the Invention

[0006] The purpose of this invention is to provide a contactor that can quickly extinguish arcs, so as to solve the problems mentioned in the background art.

[0007] This invention provides the following technical solution: a contactor for rapid arc extinguishing, comprising a housing and several switching mechanisms disposed inside the housing. The housing also includes an arc extinguishing mechanism, a sliding hole, and a contact groove. The switching mechanism further includes several stationary contacts, several moving contacts, and a linkage rod. Each stationary contact comprises a conductive plate and a stationary contact point. The stationary contact is laterally fixed inside the housing. One end of the conductive plate has the stationary contact point, and the other end is disposed in the contact groove and connected to an external wire. The conductive plate is fixedly connected to the housing in the middle and has a limiting hole near the stationary contact point. Each moving contact comprises a plate bridge and two moving contacts. The plate bridge laterally passes through the linkage rod, and the moving contacts pass vertically through the plate bridge on both sides of the plate bridge. The centers of the moving contacts and the stationary contacts are on the same vertical line. The linkage rod is disposed in the sliding hole. The arc extinguishing mechanism comprises a base plate and an arc extinguishing plate. The base plate is perpendicular to the conductive plate. The arc extinguishing plate passes through the limiting hole and is inclined towards the stationary contact point, with a gap. Four stationary contacts are arranged facing each other horizontally and vertically, and together with one moving contact, form a switching mechanism. The circuit is switched on and off by the contact and separation of the moving and stationary contacts. The electric arc generated during the switching process is guided and cooled by a nearby arc-extinguishing plate under the action of electromagnetic arc ignition. The linkage rod can simultaneously drive all moving contacts to move together, achieving reset.

[0008] Furthermore, the sliding hole is a stepped sliding hole, narrower at the top and wider at the bottom. The sidewall has through holes matching the number of moving contacts and communicating with the stationary contacts. The space between the through holes and the stationary contacts serves as a contact chamber between the stationary and moving contacts. When the stationary and moving contacts suddenly come into contact or separate, an electric arc is generated within the contact chamber. The narrow end of the stepped sliding hole is fitted into the linkage rod. The switching mechanism also includes an elastic element, a base, and rollers. The base is positioned directly below the linkage rod and is fixedly connected to it. The elastic element is fitted onto the lower end of the linkage rod, with its upper end contacting the housing and its lower end contacting the base. Connecting shafts protrude from both sides of the lower end of the base, and the rollers are mounted on the connecting shafts. The base is installed at the wider end of the stepped sliding hole. The elasticity of the elastic element causes the moving contacts to move together, achieving the reset of all moving contacts. The rollers can drive the contactor to move.

[0009] Furthermore, the upper end of the stepped sliding hole is provided with an inverted trapezoidal opening, and one side extends to the side of the housing. The shorter side of the inverted trapezoidal opening is longer than the width of the narrow end, forming a retaining edge. An end cap is provided at the upper end of the linkage rod. The width of the end cap is greater than the width of the narrow end but less than the length of the shorter side of the inverted trapezoidal opening. The linkage rod is installed into the stepped sliding hole through the end cap. The end cap can prevent the linkage rod from moving downward and disengaging from the stepped sliding hole due to the action of the elastic element, and at the same time serves as a pressing surface for resetting the on / off mechanism.

[0010] Furthermore, the linkage rod is equidistantly provided with several springs, linkage frames, and left and right penetrating sliding grooves corresponding to the moving contact. The linkage frame is installed within the sliding groove, with a protrusion on each of its upper sides. The plate bridge is installed within the sliding groove, with through holes inside. A mounting block is installed on each side of the through hole near the moving contact, and raised edges are provided on the other two sides. These raised edges support the moving contact, ensuring smooth up-and-down movement of the moving contact within the sliding groove, while also limiting the displacement space of the springs to prevent them from falling off. One end of the spring is fixed to the protrusion, and the other end is fixed to the mounting block on the same side. A pair of springs are used in a switching mechanism, arranged in a V-shape to maintain the balance of the moving contact. The moving contact moves up and down within the sliding groove with the spring, and the linkage frame serves as a support for the spring. The protrusions and mounting blocks connect the moving contact to the linkage rod via springs and prevent the springs from detaching. Each of the left and right moving contacts is connected by a spring, which maintains the moving contact in constant contact or disengagement from the stationary contact.

[0011] Furthermore, the stationary contact is T-shaped and horizontally positioned within the housing. The wider end has a circular hole A within which a stationary contact is installed, capable of contacting the moving contact. The narrower end is positioned within a contact groove and has a circular hole B for connecting external wires. An electrode plate extends outward from hole B, accommodating a plug-in connector. Non-standardized, fixed-shape electrode plates can be manufactured to meet the needs of different users, based on the requirements of specific I / O interfaces. The end of the arc-extinguishing plate is higher than the stationary contact. When using the contactor, either a wire connection or a plug-in electrode plate can be used. Wire connections are more stable but cumbersome to fix. Using a plug-in connector to directly connect the electrode plate is more convenient, but the connection is less stable than a wire connection.

[0012] Furthermore, multiple sets of contactors are arranged side-by-side within the housing, with a support block positioned between the upper and lower stationary contacts. The support block has threaded holes spaced apart, penetrating the housing. Screws and nuts for the contactors pass through these threaded holes, and the support block also serves as the sidewall of the contact groove. An inclined arc-extinguishing plate further serves to accommodate the support block, saving internal space within the contactor. Different contactors are secured together by screws passing through their threaded holes, allowing for selection of the required number of contactors.

[0013] Furthermore, an elastic protrusion is provided on one side of the substrate, and a recessed mounting groove is provided corresponding to the contact surface between the housing and the elastic protrusion. The width of the elastic protrusion is greater than or equal to the width of the mounting groove. When contactors arranged side by side need to be installed together, different contactors can be positioned and secured by the elastic protrusion, and then screws can be used to pass through the threaded holes and nuts to fix them. The operation is simple. A cavity is provided on the upper end of the substrate on the side of the contact surface with the housing to leave enough space for the flow of high-temperature gas after arc extinguishing.

[0014] Furthermore, the angle between the extension lines of the two opposing arc-extinguishing plates is 120 degrees, and the extension lines of the two arc-extinguishing plates are positioned relative to the center of the two stationary contacts. When the moving contact contacts the stationary contact, the end of the moving contact lies on the extension line of the arc-extinguishing plate. Thus, whether the moving contact is connected or disconnected from the stationary contact, the generated arc can be absorbed and cooled by the nearest arc-extinguishing plate. Furthermore, with the angle between the two arc-extinguishing plates set at 120 degrees, and the extension lines of the two arc-extinguishing plates positioned relative to the center of the two stationary contacts, the distance between the arc-extinguishing plates and the upper and lower contacts is minimized and evenly distributed.

[0015] Furthermore, three sets of contactors are arranged side by side inside the housing. The switching mechanisms of the three sets of contactors each have elastic elements and bases, and they share a common roller. The bases of the contactors on both sides have an L-shaped cross-section, while the base of the middle contactor has a convex cross-section. The three bases are in contact with and support each other. The three sets of contactors, supported by their bases, can share a single roller, thereby reducing the cost of the contactors.

[0016] Furthermore, a base is provided below the contactor for rapid arc extinguishing. The base includes several positioning posts, several positioning slots A, and a slide rail. A corresponding positioning slot B is provided below the housing, with one positioning slot B on each side of the lower end of each row of switching mechanisms. The positioning slots A are evenly distributed on both sides of the base, and their distribution and geometric parameters are consistent with those of the positioning slots B. The positioning posts can be inserted into both positioning slots A and B simultaneously. The slide rail is recessed to form a guide rail for the rollers to roll, and baffles are provided at the front and rear of the base. This replaces the traditional method of directly fixing the contactor to the base. By using positioning posts inserted into different positioning slots A and B, the contactor can be fixed in different positions along the slide rail with the rollers. This provides high flexibility and can adapt to environments where the contactor moves without altering the circuit. Additionally, the positioning posts are convenient and easy to operate.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] 1. The traditional arc-extinguishing mechanism used in contactors has been improved. The arc-extinguishing mechanism itself has a simple structure and its installation is also relatively simple. It is only necessary to insert the arc-extinguishing plate into the limiting hole of the stationary contact first, and then embed the stationary contact into the housing. The cost is low. At the same time, the arc-extinguishing mechanism can also serve as a positioning point when installing contactors side by side, which facilitates the installation and positioning of contactors.

[0019] 2. When the moving contact drives the moving point to break the connection with the corresponding set of stationary contacts, the arc-extinguishing plate, under the action of electromagnetic arc ignition, ignites the arc and accelerates the cooling of the arc, making it particularly suitable for breaking DC control circuits.

[0020] 3. The linkage rod can use the return spring to drive all moving contacts to move together to achieve reset. At the same time, in conjunction with the positioning column, positioning groove and roller, the contactor can be fixed in different positions on the slide rail, which is convenient and flexible to use.

[0021] 4. The moving contact is provided with a through hole and a mounting block to fix the spring, and a raised edge is provided on the side to support the moving contact and ensure that the moving contact moves smoothly up and down in the sliding groove. At the same time, it limits the displacement space of the spring and prevents the spring from falling off. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a three-dimensional schematic diagram of a contactor for rapid arc extinguishing according to the present invention;

[0024] Figure 2 This is a cross-sectional view of a contactor for rapid arc extinguishing according to the present invention;

[0025] Figure 3 This is a schematic diagram showing the positions of the stationary and moving contacts of a contactor for rapid arc extinguishing according to the present invention;

[0026] Figure 4 This is a three-dimensional schematic diagram of the stationary and moving contacts of a contactor for rapid arc extinguishing according to the present invention;

[0027] Figure 5 This is a schematic diagram of the stationary contact and arc-extinguishing mechanism of a contactor for rapid arc extinguishing according to the present invention;

[0028] Figure 6 This is a top view of the moving contact of a contactor for rapid arc extinguishing according to the present invention;

[0029] In the diagram: 1. Housing; 2. Arc extinguishing mechanism; 201. Base plate; 202. Arc extinguishing plate; 203. Elastic protrusion; 3. Sliding hole; 301. Stepped sliding hole; 4. Contact groove; 5. Stationary contact; 501. Conductive plate; 502. Stationary contact; 503. Limiting hole; 504. Circular hole B; 505. Electrode plate; 6. Moving contact; 601. Plate bridge; 602. Moving contact; 603. Through hole; 604. Mounting block; 605. Protruding edge; 7. Linkage rod; 701. Spring; 702. Linkage frame; 703. Sliding groove; 704. Protrusion; 8. Elastic element; 9. Base; 10. Roller; 101. Cavity; 102. Support block; 103. Threaded hole; 104. Positioning groove B; 105. Cover plate. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Please see Figure 1-6 The present invention provides a technical solution: a contactor for rapid arc extinguishing, comprising a housing 1 and a switching mechanism disposed inside the housing 1. The housing 1 is generally rectangular cabinet, and its interior also includes an arc extinguishing mechanism 2, a stepped sliding hole 301, and a contact groove 4. A single switching mechanism comprises sixteen stationary contacts 5, four moving contacts 6, and a linkage rod 7. The four stationary contacts 5 and one moving contact 6 arranged in a triangular pattern, facing each other vertically and horizontally, constitute one switching mechanism. A single switching mechanism comprises four sets of switching mechanisms arranged vertically in parallel. A single contactor may have three sets of switching mechanisms arranged horizontally in parallel. A single contactor may have one set of switching mechanisms. The stationary contact 5 includes a conductive plate 501 and a stationary contact 502. The stationary contact 5 is horizontally fixed inside the housing 1. The conductive plate 501 is T-shaped, wider on the side near the moving contact 6 and has a circular hole A. The stationary contact 502 is fixedly installed in the circular hole A. The moving contact 6 is positioned on one side in the contact groove 4 and has a circular hole B504 for connecting to an external wire. An electrode piece 505 is provided at the end of the circular hole B504. The electrode piece 505 is manufactured with a non-standardized fixed shape according to the needs of special I / O interfaces to meet the needs of different users. I / O physical connection is achieved using a plug-in method. The electrode piece 505 is used to mate with a plug-in connector. The conductive plate 501 is fixedly connected to the housing 1 in the middle and has a limiting hole 503 on the side near the stationary contact 502. When using the contactor, either a connecting wire method or a plug-in electrode piece 505 method can be selected. While wire connections offer greater stability, the fixing method is more cumbersome. Using a plug-in connector to directly insert and remove the electrode plate 505 is more convenient, but the connection is less stable than with wires. Users can also simultaneously connect a set of wires connected in series or short-circuited with the electrode plate 505. This replaces the method of installing an arc-extinguishing grid in the arc-extinguishing chamber, significantly improving the arc-extinguishing speed and simplifying the structure for easy installation.

[0032] The moving contact 6 includes a bridge 601 and two moving contacts 602. The bridges 601 are parallel to each other and pass through the linkage rod 7. The two sides of the bridge 601 are semi-circular, and the middle is rectangular. The moving contacts 602 pass through the bridge 601 vertically and are located within the semi-circles on both sides of the bridge 601. The centers of the moving contacts 602 and the stationary contacts 502 are on the same vertical line. When the moving contact 6 moves up and down, the moving contacts 602 can contact the two stationary contacts 502. The arc extinguishing mechanism 2 includes a base plate 201 and an arc extinguishing plate 202. The base plate 201 is perpendicular to the conductive plate 501. The arc extinguishing plate 202 passes through the limiting hole 503 and is inclined to the side of the stationary contacts 502, with a gap between them. The contactor realizes the circuit switching by controlling the contact and separation of the moving contact 6 and the stationary contact 5. The electric arc generated during the circuit switching process is guided and cooled by the nearby arc extinguishing plate 202 under the action of electromagnetic arc ignition. When the moving contact 6 suddenly separates from the upper stationary contact 5, an arc is generated. This arc is extinguished and cooled by the arc-extinguishing plate 202 mounted on the upper conductive plate 501. When the moving contact 6 suddenly contacts the lower stationary contact 5, generating an arc, this arc is extinguished and cooled by the arc-extinguishing plate 202 mounted on the lower conductive plate 501. When one of the arc-extinguishing plates 202 is activated, a circuit is created, preventing the arc from generating excessive heat that could damage the contactor, thus protecting the contactor. The end of the arc-extinguishing plate 202 is higher than the stationary contact 502 to enhance the arc-extinguishing effect. The traditional arc-extinguishing mechanism 2 used in contactors has been improved. The arc-extinguishing mechanism 2 has a simpler structure and is easier to install. It only requires inserting the arc-extinguishing plate 202 into the limiting hole 503 of the stationary contact 5, and then embedding the stationary contact 5 into the housing 1. This method is cost-effective and particularly suitable for breaking DC control circuits requiring multiple contacts.

[0033] The switching mechanism also includes an elastic element 8, a base 9, and a roller 10. The base 9 is located directly below the linkage rod 7 and is fixed to the linkage rod 7 as a whole. The elastic element 8 is a compression spring, sleeved on the lower end of the linkage rod 7, with its upper end contacting the housing 1 and its lower end contacting the base 9. Each of the three switching mechanisms has one elastic element 8 and one base 9, and shares one roller 10. The two side bases 9 have an L-shaped cross-section, and the middle base 9 has a convex cross-section. The three bases 9 contact and support each other, facilitating installation and ensuring that their operation does not interfere with each other. The three sets of contactors can share one roller 10 through the support of the bases 9, thereby reducing the cost of the contactors. The lower end of the base 9 of the middle switching mechanism has protruding baffles and connecting shafts on both sides. The lower side of the baffle is semi-circular with a shaft hole at the center. The connecting shaft passes through the shaft hole and mounts the roller 10. The upper side of the baffle is rectangular. The width of the baffle is smaller than the width of the upper end of the base 9. The upper side and the roller 10 are mounted on the connecting shaft. The base 9 is installed at the wide end of the stepped sliding hole 301. The elasticity of the elastic element 8 drives the moving contacts 6 to move together, realizing the reset of all moving contacts 6. The roller 10 can drive the contactor to move.

[0034] The stepped sliding hole 301 is a rectangular through hole that is narrower at the top and wider at the bottom. The space between the through hole and the stationary contact 5 serves as a contact chamber between the stationary contact 5 and the moving contact 6. When the stationary contact 5 and the moving contact 6 suddenly come into contact or separate, an electric arc will be generated in the contact chamber. The side wall has through holes of the same number as the moving contacts 6, communicating with the stationary contacts 5. The narrow end of the stepped sliding hole 301 is fitted into the linkage rod 7. The uppermost end of the stepped sliding hole 301 has an inverted trapezoidal opening, extending to the side of the housing 1 on one side. The shorter side of the inverted trapezoidal opening is longer than the width of the narrow end, forming a retaining edge. The upper end of the linkage rod 7 has an end cap, the width of which is greater than the width of the narrow end but less than the length of the shorter side of the inverted trapezoidal opening. The linkage rod 7 can pass through the end cap and be installed into the stepped sliding hole 301. The end cap prevents the linkage rod 7 from moving downwards and disengaging from the stepped sliding hole 301 due to the action of the elastic element 8, and also serves as a manual pressing surface for resetting the on / off mechanism. The linkage rod 7 can simultaneously drive all the moving contacts 6 to move together, achieving resetting.

[0035] The linkage rod 7 is installed in the stepped sliding hole 301 and is a rectangular prism. The linkage rod 7 is provided with springs 701, linkage frames 702 and sliding grooves 703 that penetrate from the left and right at equal intervals, the same number as the moving contacts 6. The linkage frame 702 is installed in the sliding groove 703. The linkage frame 702 is wide at the top, narrow in the middle, and its end is fixed to the bottom of the sliding groove 703 as a whole. A spherical protrusion 704 is provided on the left and right sides of the upper end of the linkage frame 702. A bridge plate 601 is disposed within a sliding groove 703. A rectangular through hole 603 is formed in the middle of the bridge plate 601, the width of which is slightly larger than the outer diameter of the spring 701. A hemispherical mounting block 604 is positioned on each side of the through hole 603 near the moving contact 602, and vertically upward-pointing protrusions 605 are provided on the other two sides. These protrusions 605 support the moving contact 6, ensuring its smooth vertical movement within the sliding groove 703, while also limiting the displacement space of the spring 701 to prevent it from detaching. One end of the spring 701 is fixed to the protrusion 704, and the other end is fixed to the mounting block 604 on the same side. A pair of springs 701 are used in a switching mechanism, forming a V-shape to maintain the balance of the moving contact 6. The moving contact 6 moves vertically within the sliding groove 703 with the spring 701, and the linkage frame 702 serves as a support for the spring 701. The protrusion 704 and the mounting block 604 can connect the moving contact 6 and the linkage rod 7 through the spring 701 and prevent the spring 701 from disengaging. The two moving contacts 602 on the left and right are each connected by a spring 701. The spring 701 can keep the moving contact 602 in constant contact with or disengaged from the stationary contact 502.

[0036] Support blocks 102 are provided between the upper and lower stationary contacts 5. Threaded holes 103 are horizontally spaced on the support blocks 102, penetrating the housing 1. Screws and nuts for the contactors pass through the threaded holes 103. The support blocks 102 also serve as sidewalls for the contact grooves 4. An inclined arc-extinguishing plate 202 can also serve as a buffer for the support blocks 102, saving internal space in the contactors. Different contactors arranged side-by-side are fixed together by screws passing through the threaded holes 103. One side of the housing 1 is a solid plate, and the other side is a hollow surface with contact grooves 4. When two rows of contactors are installed side-by-side, one solid plate seals the other hollow surface. A cover plate 105 is provided at the outer end of the other hollow surface. The cover plate 105 has a circular hole corresponding to the threaded hole 103. Screws are provided on one side of the cover plate 105, and nuts are provided on the solid plate side of the housing 1. In other embodiments, the threaded holes 103 can be through holes, and multiple rows of contactors can be fixed together side-by-side by screws of different lengths, making installation easier.

[0037] A long, elastic protrusion 203 is provided on the side of the substrate 201 near the hollow surface. A recessed mounting groove is provided on the solid surface of the housing 1 corresponding to the contact surface of the elastic protrusion 203. The width of the elastic protrusion 203 is slightly larger than the width of the mounting groove, so that the elastic protrusion 203 and the mounting groove are interference-fitted. When contactors arranged side by side need to be installed together, the elastic protrusion 203 can be used to position and snap different contactors together. Then, screws are used to pass through the threaded holes 103 and nuts to fix the contactors arranged side by side. The operation is simple. A cavity 101 is provided on the side of the substrate 201 that contacts the housing 1 to leave enough space for the flow of high-temperature gas after arc extinguishing.

[0038] The extended lines of the two opposing arc-extinguishing plates 202 are angled at 120 degrees, and the extended lines of the two arc-extinguishing plates 202 are positioned relative to the center of the two stationary contacts 502. When the moving contact 602 contacts the stationary contact 502, the end of the moving contact 602 lies on the extended line of the arc-extinguishing plate 202. Thus, whether the moving contact 602 is connected or disconnected from the stationary contact 502, the generated arc can be absorbed and cooled by the nearest arc-extinguishing plate 202. Furthermore, with the angle between the two arc-extinguishing plates 202 set at 120 degrees and the extended lines of the two arc-extinguishing plates 202 positioned relative to the center of the two stationary contacts 502, the distance between the arc-extinguishing plates 202 and the contacts is minimized and evenly distributed, ensuring that the arc is cooled instantly.

[0039] A base is installed below the contactor for rapid arc extinguishing. The base is bolted to the contactor's input end as needed. The base includes six positioning posts, eighteen positioning slots A, and a slide rail. Six corresponding positioning slots B104 are located below the housing 1, with one positioning slot B104 on each side of the lower end of each row of switching mechanisms. The positioning slots A are evenly distributed on both sides of the base, and their distribution and geometric parameters are consistent with those of the positioning slots B104. The positioning posts can be inserted into both positioning slots A and B104 simultaneously. The slide rail is recessed to form a guide rail for the roller 10 to roll. Baffles are provided at the front and rear of the base to prevent the contactor from detaching from the base. This replaces the traditional method of directly fixing the contactor to the base. By using positioning posts in conjunction with different positioning slots A and B104, the contactor can be fixed in different positions along the slide rail with the roller 10. This provides high flexibility and can adapt to environments where the contactor moves without altering the circuit. Furthermore, the positioning posts are convenient and easy to operate.

[0040] Working principle:

[0041] 1. Contactor Installation: First, install the arc-extinguishing mechanism 2 into the stationary contact 5 through the limiting hole 503. Then, install the stationary contact 5 into the housing 1 in sequence. One end of the stationary contact 502 is set in the through hole, and one end of the electrode plate 505 is set in the contact groove 4. First, install the spring 701 and the moving contact 6 into the linkage rod 7. Then, embed the linkage rod 7 into the housing 1 through the stepped through hole. The contactors arranged side by side are initially positioned and installed by inserting the elastic protrusion 203 into the corresponding mounting groove. Then, screws are passed through the threaded holes 103 of different contactors and fixed from the cover plate 105. Then, the roller 10 is installed in the slide rail. After confirming the position of the contactor, the positioning pin is passed through the positioning groove B104 and the positioning groove A in sequence to fix the contactor on the base.

[0042] 2. Arc Extinguishing Process: When the moving contact 6 suddenly separates from or connects with the upper stationary contact 5, an electric arc is generated. The arc penetrates the nearby air and is guided through electromagnetic arc ignition to the arc-extinguishing plate 202 installed on the upper conductive plate 501. The arc-extinguishing plate 202 elongates and cools the arc. When the moving contact 6 suddenly contacts or separates from the lower stationary contact 5, an electric arc is generated. The arc penetrates the nearby air and is guided through electromagnetic arc ignition to the arc-extinguishing plate 202 installed on the lower conductive plate 501. The arc-extinguishing plate 202 elongates and cools the arc.

[0043] It should be noted that, in this document, relational terms such as before, after, above, and below are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A contactor for rapid arc extinguishing, comprising a housing (1) and a plurality of switching mechanisms disposed inside the housing (1), characterized in that: The housing also includes an arc-extinguishing mechanism (2), a sliding hole (3), and a contact groove (4); the switching mechanism also includes several stationary contacts (5), several moving contacts (6), and a linkage rod (7). The stationary contact (5) includes a conductive plate (501) and a stationary contact (502). The stationary contact (5) is horizontally fixed inside the housing (1). The conductive plate (501) has a stationary contact (502) at one end near the inner side of the housing (1), and the other end is set in the contact groove (4) and connected to an external wire. The conductive plate (501) is fixedly connected to the housing (1) in the middle, and a limiting hole (503) is provided on the side near the stationary contact (502). The moving contact (6) includes a plate bridge (601) and two A movable contact (602) is connected to a bridge (601) which passes through a linkage rod (7). The movable contact (602) passes through the bridge (601) vertically and is located on both sides of the bridge (601). The center of the movable contact (602) and the stationary contact (502) are on the same vertical line. The linkage rod (7) is located in the sliding hole (3). The arc extinguishing mechanism (2) includes a base plate (201) and an arc extinguishing plate (202). The base plate (201) is perpendicular to the conductive plate (501). The arc extinguishing plate (202) passes through a limiting hole (503) and is inclined to the stationary contact (502) with a gap. Four stationary contacts (5) are arranged facing each other on the left and right and up and down respectively, and together with a movable contact (6), they form a switching mechanism. An elastic protrusion (203) is provided on one side of the substrate (201), and a recessed mounting groove is provided on the contact surface between the housing (1) and the elastic protrusion (203). The width of the elastic protrusion (203) is greater than or equal to the width of the mounting groove. A cavity (101) is provided on the contact surface between the upper end of the substrate (201) and the housing (1).

2. The contactor for rapid arc extinguishing according to claim 1, characterized in that: The sliding hole (3) is a stepped sliding hole (301), which is narrow at the top and wide at the bottom. Several through holes are provided on the side wall and communicate with the stationary contact (5). The narrow end of the stepped sliding hole (301) is fitted into the linkage rod (7). The switching mechanism also includes an elastic element (8), a base (9) and a roller (10). The base (9) is located directly below the linkage rod (7) and is fixedly connected to the linkage rod (7). The elastic element (8) is fitted on the lower end of the linkage rod (7), with its upper end in contact with the housing (1) and its lower end in contact with the base (9). Connecting shafts protrude from both sides of the lower end of the base (9), and the roller (10) is mounted on the connecting shaft. The base (9) is installed at the lower end of the stepped sliding hole (301).

3. The contactor for rapid arc extinguishing according to claim 2, characterized in that: The upper end of the stepped sliding hole (301) is provided with an inverted trapezoidal opening, and one side extends to the side of the housing (1). The length of the short side of the inverted trapezoidal opening is greater than the width of the narrow end to form a retaining edge. The upper end of the linkage rod (7) is provided with an end cap. The width of the end cap is greater than the width of the narrow end and less than the length of the short side of the inverted trapezoidal opening. The linkage rod (7) passes through the end cap and is installed into the stepped sliding hole (301).

4. A contactor for rapid arc extinguishing according to claim 2, characterized in that: The linkage rod (7) is equidistantly provided with several springs (701), linkage frames (702) and sliding grooves (703) that penetrate left and right, corresponding to the moving contact (6). The linkage frame (702) is provided in the sliding groove (703), and a protrusion (704) is provided on each side of the upper end of the linkage frame (702). The plate bridge (601) is provided with a through hole (603). A mounting block (604) is provided on each side of the through hole (603) near the moving contact (602), and a raised edge (605) is provided on the other two sides. One end of the spring (701) is fixed on the protrusion (704), and the other end is fixed on the mounting block (604) on the same side. A pair of springs (701) are provided in a set of on / off mechanisms, and the two springs (701) are in a figure-eight shape.

5. A contactor for rapid arc extinguishing according to claim 2, characterized in that: The stationary contact (5) is T-shaped and is horizontally arranged inside the housing (1). The wide end is provided with a round hole A and a stationary contact (502) is installed in the round hole A. The stationary contact (502) can contact the moving contact (602). The narrow end is provided in the contact groove (4) and a round hole B (504) is provided. The round hole B (504) is used for connecting external wires. An electrode plate (505) is provided extending outward from the round hole B. The end of the arc extinguishing plate (202) is higher than the end of the stationary contact (502).

6. A contactor for rapid arc extinguishing according to claim 2, characterized in that: Multiple sets of contactors are arranged side by side inside the housing (1). A support block (102) is provided between the upper and lower stationary contacts (5). The support block (102) is provided with threaded holes (103) at intervals. The threaded holes (103) penetrate the housing (1). The housing (1) is provided with screws and nuts that penetrate the threaded holes (103). The support block (102) also serves as the side wall of the contact groove (4).

7. A contactor for rapid arc extinguishing according to claim 6, characterized in that: The angle between the extension lines of the two opposing arc-extinguishing plates (202) is 120 degrees, and the extension lines of the two arc-extinguishing plates (202) are relative to the center position of the two stationary contacts (502); when the moving contact (602) contacts the stationary contact (502), the end of the moving contact (602) is on the extension line of the arc-extinguishing plate (202).

8. A contactor for rapid arc extinguishing according to claim 6, characterized in that: Three sets of contactors are arranged side by side inside the housing (1). The switching mechanism of the three sets of contactors is provided with an elastic element (8) and a base (9) respectively, and they share a roller (10). The contactor bases (9) on both sides have an L-shaped cross section, and the contactor base (9) in the middle has a convex cross section. The three bases (9) are in contact with each other and support each other.

9. A contactor for rapid arc extinguishing according to claim 8, characterized in that: The contactor for rapid arc extinguishing is provided with a base, which includes several positioning posts, positioning grooves A and slide rails. Several corresponding positioning grooves B (104) are provided below the housing (1). A positioning groove B (104) is provided on both sides of the lower end of each column of switching mechanism. The positioning grooves A are evenly distributed on both sides of the base, and their distribution and geometric parameters are consistent with those of the positioning grooves B (104). The positioning posts can be inserted into the positioning grooves A and B (104). The slide rail is recessed to form a guide rail for the roller (10) to roll. Baffles are provided at the front and rear of the base.

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